By combining them in different ways, you will be able to implement all types of digital components. There are mainly 7 types of logic gates that are used in expressions. What are the types of digital logic gates? While considering the transistor-transistor logic (TTL), the lower state is assumed to be zero volts (0V), and the higher state is considered as five volts positive (+5V). But in the negative logic system, the higher of the two voltage levels are represented as 0 and the lower of the two voltage levels are represented as 1. In the positive logic system, the higher of the two voltage levels are represented as 1, and the lower of the two voltage levels are represented as 0. Level logic is of two types such as positive logic or negative logic. Here we are following level logic, in which the voltage levels are represented as logic 1 and logic 0. It explains how the logic circuit output responds to various combinations of logic levels at the inputs. A table that lists out the combination of input variables and the corresponding output variables is termed as “TRUTH TABLE”. Inputs and outputs of logic gates are in two levels termed as HIGH and LOW, or TRUE and FALSE, or ON and OFF, or simply 1 and 0. Here the inputs and output of all the gates of integrated devices can be accessed and also the external connections are made available to them just like discrete logic gates. The logic gates can be built up in a wide variety of forms such as large-scale integrated circuits (LSI), very large-scale integrated circuits (VLSI), and also in small-scale integrated circuits (SSI). Due to this reason, the logic gates can also be considered electronic circuits. Logic gates are implemented by using transistors, diodes, relays, optics, and molecules or even by several mechanical elements. The reason for which the computers are capable of performing complex operations is due to the interconnection of these logic gates. Here various combinations of binary mathematical functions are applied to show the true state of a digital system. Logic 1 represents high, and logic 0 represents low. A logic gate is considered as a device that has the ability to produce one output level with the combinations of input levels. What are digital logic gates?ĭigital logic gates are simply a string of transistors working together to solve basic boolean functions. Some of the common examples of the application of digital logic gates are half adder, full adder, and flip flops. It aims to be a stepping stone for all the digital electronics enthusiasts who are embarking on their learning journey. This article is all about logic gates and their types. Hence, if you are keen on understanding digital electronics, you must be clear with the basic boolean logic. Therefore, to make the best of these 1s and Os, logic gates form the foundation to build a digital system that we know today. One where the language is restricted to 1s and 0s. A digital system is basically a binary world.
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